1 (12 oz.) pkg. chocolate chips
1 (14 oz.) can sweetened condensed milk
2 tbsp. butter
2 c. dry roasted peanuts
1 (10 1/2 oz.) pkg. miniature marshmallows

In top of double boiler over boiling water, melt chocolate chips, condensed milk, and butter. Remove from heat. In large bowl, combine nuts and marshmallows. Fold in chocolate mixture. Spread in waxed paper lined 13 x 9 inch pan. Chill for 2 hours or until firm. Remove from pan; peel off waxed paper and cut into squares. Cover and store at room temperature.